MAX15028 Maxim Integrated Products, MAX15028 Datasheet - Page 7

• Manufacturer Part Number: MAX15028
• Description: (MAX15027 / MAX15028) 1A Low-Dropout Regulators
• Manufacturer: Maxim Integrated Products

www.datasheet4u.com
The MAX15027/MAX15028 low-dropout linear regula-
tors operate from input voltages as low as 1.425V and
deliver up to 1A of continuous output current with a
maximum dropout voltage of only 225mV.
The MAX15028 operates with an input voltage as low
as 1.425V if the bias voltage (V
available. The power is applied at IN while the control
is provided through BIAS input. The current drawn by
BIAS is negligible when the LDO goes into shutdown.
This feature is especially useful in automotive applica-
IN
BIAS
EN
GENERATOR
MAX15028
INTERNAL
SUPPLY
_______________________________________________________________________________________
ONLY
REF
Detailed Description
1.425V to 3.6V Input, 1A Low-Dropout
UVLO
BIAS
BIAS
) of 3V to 5.5V is
OVERTEMPERATURE
REF
PROTECTION
MAX15027
CONTROL
ONLY
Regulators with BIAS Input
LOGIC
UVLO
IN
GND
tions where the BIAS input is derived from an always-
on LDO that expects to provide minimal power during
the key-off condition.
The pMOS output stage can be driven from input volt-
ages down to +1.425V without sacrificing stability or
transient performance. The output voltage of all the
regulators is adjustable from 0.5V to V
accurate over load and line variations, from -40°C to
+125°C. Since these regulators have a pMOS output
device, supply current is not a significant function of
load or input headroom.
SOFT-START
AMPLIFIER
ERROR
MAX15027
MAX15028
WITH
Functional Diagram
MOS DRIVER
WITH I
LIMIT
IN
and is ±2%
P
OUT
SS
FB
7